Home / 1,112.48-1,668.57-290.75

Finding the Fourth Proportional to 1,112.48, 1,668.57 and 290.75

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Solution

The fourth proportional to 1,112.48, 1,668.57 and 290.75 is: 436.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.48 : 1,668.57 = 290.75 : x
  2. Step 2: Convert to fraction form
    1,112.48/1,668.57 = 290.75/x
  3. Step 3: Cross multiply
    1,112.48x = 1,668.57 × 290.75
  4. Step 4: Simplify right side
    1,112.48x = 485,128.38
  5. Step 5: Solve for x
    x = 485,128.38/1,112.48
  6. Step 6: Final answer
    x = 436.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.